Remove confusing warning on output error.

lib/pry.rb

@@ -29,7 +29,6 @@ class Pry
       # Read the class name off of the singleton class to provide a default inspect.
       klass = (class << value; self; end).ancestors.first
       stringified = "#<#{klass}:0x#{value.__id__.to_s(16)}>"
-      Helpers::BaseHelpers.stagger_output("output error: #{ex.inspect}", output) if ex
     end
 
     Helpers::BaseHelpers.stagger_output("=> #{Helpers::BaseHelpers.colorize_code(stringified)}", output)

test/test_pry_output.rb

@@ -36,9 +36,5 @@ describe Pry do
     it "should not be phased by un-inspectable things" do
       mock_pry("class NastyClass; undef pretty_inspect; end", "NastyClass.new").should =~ /#<NastyClass:0x[0-9a-f]+>/
     end
-
-    it "should warn you about un-inspectable things" do
-      mock_pry("class NastyClass; undef pretty_inspect; end", "NastyClass.new").should =~ /output error: #<(NoMethodError|NameError): undefined method `pretty_inspect'/
-    end
   end
 end